Glass cutting and drawing frame



(No Model.)

- J. CLASS. GLASS CUTTING AND DRAWING FRAME- N0. 419,640.

Patented Jan. 21, 1890.

ATTORNEY NITED STATES ATENT OFFICE.

JOHN CLASS, OF CANTON, OHIO.

GLASS CUTTING AND DRAWING FRAME.

SPECIFICATION forming part of Letters Patent N 0. 419,640, dated January 21, 1890. Application filed June 24; 1889. Serial No. 315,294. (No model.)

To all whom it may concern.-

Be it known that I, JOHN GLASS, a citizen of the United States, and a resident of Canton, county of Stark, State of Ohio, have invented a new and useful Improvement in Glass Cutting and Drawing Frames, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invention relates to improvements in glass cutting or drawing frames; and it consists in certain features of construction and combination of parts, as will be hereinafter described, and set forth in the claims.

Figure l of the accompanying drawings is a view in perspective of a glass-cutting frame illustrating my invention. Fig. 2 is a similar view of a corner portion of the metal border. Fig. 3 is a similar view of the head and a fragment of the rule or gage to guide the diamond or other cut-ting or drawing instrument. Fig. 4 is a plan view of the head of the rule, showing the head set centrally on the rule. Fig. 5 is a similar view of the reverse side, showing the head set one-eighth inch to one side of the center of the rule. Fig. 6 is a perspective of a rule having a T- square portion, having metal heads, as shown on rule in Fig. 3. Fig. 7 is a perspective of a fragment of strips composing the frame, showing manner of construction.

Similar letters of reference indicate corresponding parts in all the figures of the drawings.

A represents the body of the frame, which is made of hard wood cutin strips a b, and may be of different-colored wood for the purpose of ornamentation, the strips having grooves C, as shown in Fig. 7, in which is placed a series of narrow tongues c, the grain of which transverses the line of the groove. By this arrangement warping and splitting of the frame are prevented, which are liable to occur when the grain of the tongue portion of the table runs parallel with the groove.

The outer edge portions B and C of the frame are raised a distance above the face of the frame A, as shown in Fig. 1, and graduated, showing inches and fractions thereof, the inch-divisions numbered from a zero'point at the upper left-hand corner and reading from said point to any desired number, limited only by the size of the frame.

For the purpose of this application I have shown lines, as 00 and 3 crossing each other at right angles on the face of the frame, said lines corresponding with the designated inches on the raised portion of the face of the frame. These lines may be impressed or inlaid and in such colors as may be preferred.

About the outer edges ,B and O of the frame is placed a metal border D, compressing a series of racks z, having outwardly-projected teeth d and alternating spaces e, the said teeth to be flush with the raised portion of the frame and slightly tapered or out un der from top to bottom, as shown'b y the drawings. Said border may be made of any suitable material, preferably of cast-iron, for the reason that the influence of temperature is slight on such metal; and to further prevent warping or twisting of the frame by the expansion or contraction of the border I have divided them into short sections, as 2, which are secured to the frame by screws, allowing a small space between the ends of' the racks to allow of a slight expansion without inter fering with the alignment of the frame.

To preserve the integrity of the zero-point of the frame a corner-piece E is provided, forming a continuation of the toothed border about the corner of the frame. In this case the projected teeth d are set on a half-inch pitch; or, in other words, there are two teeth d and two spaces 6 to the i-nch,the lines 00 and y 011 the face of the frame corresponding with each alternate space.

It will be noticed that the raised portion B O of the frame forms a square or right angle corresponding with thelines w y, and may be relied upon to hold the glass to be cut parallel therewith.

The rule or gage F is preferably made of strips of hard wood of two or more kinds, glued together in the usual way. On one end of said rule is secured a head G, in form substantially as shown, having an outwardlyprojected tooth portion, as f, to engage the borders 1) on the frame, said tooth having its inner face out under and concaved, as h, said concave adapted to the apex or convex portion of the tooth don borderof the frame, and the center of said concave to register with the center line of the rule F, as shown by the arrow in Fig. 4, and the outside front portions k of the tooth f are sloped inwardly, so as to allow the said tooth f to pass into the space 6, the portions 70 to rest against the sides of the rack-teeth cl. Thus it will be in operation, to have the edge of rule F register with the inch-line, the concaved portion h of the tooth f will rest on the outer or convex portion of the toothd, and for quarter-inches the tooth portion f will pass intothe space e, the 70 portion or sides resting against the sides of the teeth d, and when so placed the edges of the rule will be central to the space between the lines that cross the frame, thus enabling the operator to quickly place the rule for cutting inches and quarter-inches; and to adapt the same rule to register one-eighthinch divisions, the head G, on the opposite side of the rule, is provided with a tooth portion m similar to that described as f, except in position on the rule. In this case the'center of the concave portion of the tooth m is set to register with line a on the rule, which is one-eighth of an inch to one side of the center line I, as shown by the arrowin Fig. 5. By so placing the tooth m the one-eighth-inch divisions may be cut on either edge of the rule, cutting even inches and quarter-inches by engaging the tooth f with the tooth d or the Space 6, or the fractions by turning the rule drawing frame having outwardly-projected over and engaging the tooth 'm with the teeth (Z and spaces e in a similar manner to that in cutting inches, quarters, and half inches with the other side of the rule.

I would not belimited to the forms of tooth either on the rack z or the head G, as other forms may be used such as V-shaped with equally good results. for use a T-square H, as shown in Fig. 6, the cross-pieces J having head G, hereinbefore described, secured thereto to engage the teeth of the border on the frame in a manner similar to that described in the use of the rule F.

Having thus fully described the nature and object of my invention,what I claim, and desire to secure by Letters Patent, is-

1. A glass cutting or drawing frame constructed of strips, as a I), having side grooves O, secured together by grooves and tongues c, the grain of which runs transversely to said There is also provided j 1 drawing frame having a border of outwardlygrooves and having raised graduated portions B O, and a border having outwardlyprojected teeth cl, substantially as described, and for the purpose set forth.

2. The combination, in a glass cutting or drawing frame, of a body portion A, raised graduated portions B and O, and a metal border D, composed of a series of sections .2,

and a corner-pieceE, having outwardly-projected teeth d, substantially as described, and

for the purpose set forth.

3. The combination, with a glass cutting or 1 drawing frame having a body portion A,raised graduated portions B C, and a border having outwardly-projected teeth cl, of a rule F,

,having a head, as G, secured thereto, said as G, secured thereto, said head-piece having on one side of the rule a tooth, as f, centralthereto, said tooth having a concaved portion ';h and sloping sides 70, and on the opposite side of the rule a similar head on, set to one 3 side of the center of said rule, said teeth f i and m to engage the teeth d of the frame.

5. The combination, with aglass cutting or teeth (I, of a T-square, as H, having heads, G secured thereto, said heads having teeth f and m, adapted to engagethe teeth (1 of the frame,

whereby the rule will be held at desired angles across the frame, substantially as described and set forth.

6. The combination, with a glass cutting or projected teeth d, of a rule or gage having a tooth adapted to engage saidtooth d as hereinbefore described, and for the purpose set forth.

' In testimony whereof I have hereunto setmy hand this 17th day of June, A. D. 1889..

JOHN CLASS. Witnesses:

W. K. MILLER, CHAs. R. MILLER. 

